/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.dx.io;

import com.android.dx.util.Unsigned;

/**
 * An annotation.
 */
public final class Annotation implements Comparable<Annotation> {

	private final DexBuffer buffer;
	private final byte visibility;
	private final int typeIndex;
	private final int[] names;
	private final EncodedValue[] values;

	public Annotation(DexBuffer buffer, byte visibility, int typeIndex,
			int[] names, EncodedValue[] values) {
		this.buffer = buffer;
		this.visibility = visibility;
		this.typeIndex = typeIndex;
		this.names = names;
		this.values = values;
	}

	public byte getVisibility() {
		return visibility;
	}

	public int getTypeIndex() {
		return typeIndex;
	}

	public String getTypeName() {
		return buffer.typeNames().get(typeIndex);
	}

	public int[] getNames() {
		return names;
	}

	public EncodedValue[] getValues() {
		return values;
	}

	public void writeTo(DexBuffer.Section out) {
		out.writeByte(visibility);
		out.writeUleb128(typeIndex);
		out.writeUleb128(names.length);
		for (int i = 0; i < names.length; i++) {
			out.writeUleb128(names[i]);
			values[i].writeTo(out);
		}
	}

	@Override
	public int compareTo(Annotation other) {
		if (typeIndex != other.typeIndex) {
			return Unsigned.compare(typeIndex, other.typeIndex);
		}
		int size = Math.min(names.length, other.names.length);
		for (int i = 0; i < size; i++) {
			if (names[i] != other.names[i]) {
				return Unsigned.compare(names[i], other.names[i]);
			}
			int compare = values[i].compareTo(other.values[i]);
			if (compare != 0) {
				return compare;
			}
		}
		return names.length - other.names.length;
	}

	@Override
	public String toString() {
		if (buffer == null) {
			return visibility + " " + typeIndex;
		}

		StringBuilder result = new StringBuilder();
		result.append(visibility);
		result.append(" ");
		result.append(buffer.typeNames().get(typeIndex));
		result.append("[");
		for (int i = 0; i < names.length; i++) {
			if (i > 0) {
				result.append(", ");
			}
			result.append(buffer.strings().get(names[i]));
			result.append("=");
			result.append(values[i]);
		}
		result.append("]");
		return result.toString();
	}
}
